The numbers of courses taught per semester by a random sample of university professors are shown in the histogram. Make a frequency distribution for the data. Then use the table to estimate the sample mean and sample standard deviation of the data set.Make a frequency distribution for the data X. f.1=2=3=4=The sample mean is x=The sample standard deviation is s=

e the 25 L 22 20 18 15 15 Number of professors 10 2 2 3 4 Number of courses taught per semester